Answers

I assume by 'Dragon Arum' you mean Dracunculus Vulgaris, red with a black spathe.
I have just planted 6 and the pointed side does face upwards, sometimes the roots are not visible, but the bottom of my bulbs was smooth.
Be warned when these are in flower they produce a smell of rotting flesh to attract flies to pollinate them, so don't plant them too close to your, or your neighbours house, they might offend!!

A trick I use if I am not sure which way up a bulb should be planted, is to put it on its side in the hole. Always works! This also works well for things like crown imperials where excessive moisture may lodge in the top of the bulb and cause rotting